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UCD3138ARMHT Datasheet(PDF) 24 Page - Texas Instruments

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Part # UCD3138ARMHT
Description  Highly Integrated Digital Controller for Isolated Power
PDF  83 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

UCD3138ARMHT Datasheet(HTML) 24 Page - Texas Instruments

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2= FLT_STEP
2= - 1
2= 1
2= 0
A_CNT or B_CNT value
0
127
FLT_THRESH
TARGET_LOW
Else if A_CNT or B_CNT < FLT_THRESH
2= FLT_STEP
If in Manual Control Mode
2= Manual Control register value
Else if A_CNT or B_CNT < TARGET_LOW
2= - 1
Else if A_CNT or B_CNT > TARGET_LOW + TARGET_OFFSET
2= 1
Else
2= 0
TARGET_OFFSET
UCD3138A
SLUSC66B – MARCH 2015 – REVISED MAY 2015
www.ti.com
Figure 5-10. DTC Interface Principle
Based on the DTC measured, in the next cycle:
•
A_ADJ = A_ADJ + A_
∆
•
A_ADJ = A_ADJ + B_
∆
In each cycle, the A_ADJ and B_ADJ accumulator values are dynamically adjust the dead time. The
∆
value changes after the measured body diode conduction time. A_ADJ and B_ADJ have been measured
and compared to the threshold values in automatic control mode. A_ADJ and B_ADJ can be controlled by
firmware while in manual control mode.
Other figures of this peripheral include negative current fault protection, consecutive fault counter, DTC
input multiplexor, etc. For details, refer to the programmer's manual.
24
Specifications
Copyright © 2015, Texas Instruments Incorporated
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Product Folder Links: UCD3138A



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